List of Lower Silurian Fossils, Cincinnati Group. 63 



Genus Cythere, Muiler. Gr. Kutliere, surname of Venus. 



35 C^'there Cincinuatiensis, Meek. 



36 irregularis, S. A. Miller. L. irregularis, irregular. 



INCERTA SEDES. 



Genus PlumuUtes, Barrande. Ij. jjlumula, dim. ol plu ma, a feather. 



37 Plumulites Jamesi, Hall and Whitfield. 



Note. — This genus has been referred to the Cirripedia. 



Genus Anomaloides, Ulrich. Gr. anomalos, irregular; eidos, form. 



38 Anomaloides retieulatus, Ulrich. L. reticulatus, net-like. 



Class Annelida. L. annellus, a little ring; Gr. eidos, form. 

 Order Errantia. L. erro, I wander. 



Genus Walcottia, Miller and Dyer. Proper name. 



39 Walcottia rugosa, Miller and Dyer. L, ruqosus, wrinkled. 



Genus Nereidavus.^ Grinnell. L. Nereis [idis), mythological; avus, 

 ancestor. 



40 Nereidavus varians, Grinnell. L. varians, changing. 



Genus Eotrojihonia^UlYiQh. Gr. eos, early; Trophonia, a genus of ex- 

 isting annelids. 



41 Eotrophonia setigera, Ulrich. L. seta, a bristle; gero, I carr3^ 



Genus Protoscolex, Ulrich. Gr. ^^roios, first; skolex, a worm. 



42 Protoscolex Coviugtonensis, Ulrich. 



43 simplex, Ulrich. L. simplex, simple. 



44 ornatus, Ulrich. L. ornatus, ornamented. 



45 tenuis, Ulrich. L. tenuis^ slender. 



Genus ScoUthus, Haldemau. Gr. skolex, a worm; Utiios, a stone. 



46 Scolithus linearis, Haldemau. L. linearis, linear. 



Note. — Scolithus has sometimes been placed in the vege- 

 table kingdom. The borings, or tracks, called Helmin- 

 thites, b}^ Salter, are the only record of their existence. 



Order Tubicola. L. tuba, tube; colo, I inhabit. 

 Genus Conchicolitts, Nicholson, L. concha, a shell; coloi^l inhabit. 



47 Conchicolites corrugatus, Nicholson. L. corrugo, I wrinkle. 



48 flexuous, Hall. Jj. Jlexuosus, tortuous. 



49 minor, Nicholson. L. minor, less. 



50 striatellus, Nicholson. L. stria, a ridge. 



